Well, welcome aboard! I was the previous person to join, and so far there hasn't been much activity here, but maybe we can change that... hmm?
Uh, I guess I'll get the ball rolling then. What's everyone's favourite platform. For me, right now I'd have to say Palm OS. There's a great (well, buggy, but ok) little compiler, OnBoardC that runs right off my palm. In fact, for the last week I've been making a version of Conway's Game of Life.